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		x<sub>1</sub>+x<sub>2</sub>=y<sup>2</sup>
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		<b>加粗b</b><i>斜体i</i><u>下划线u</u><s>删除线s</s><br/>
		<strong>语气加重strong</strong><em>强调em</em><ins>插入ins</ins><del>删除del</del>
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 _____ | _____        \     /   /______    |  |     / /_  /
()____)+()____)     -----  /       |       | -+-.  /_.|_|/_.
()____)+()____)      \ /  /___   __|__   | |  | |   / | | /
()____)+()____)     ----- | |    | |     |_| _|_|_ /_\`-'/_\
()____)+()____)     __|__ | |  __|_|____   |  |     ___|___
()____)+()____)      /|\  | |      |       | / \     _/|\_
     / | \
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	 换行标记是&ltbr/&gt
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